Daikin VRV III RXYQ5-54PY1 Service Manual page 258

Si34-601A
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn power supply off, and
turn power supply on again.
Return to normal?
NO
Electronic
expansion valve is
connected to X21A and
X23A of outdoor unit
PC board
(A1P).
YES
Normal
when coil
check (∗1) of the moving
part of the electronic
expansion valve is
checked.
YES
The connecting
cable is short-circuited or
disconnected.
NO
∗Make measurement of resistance
between the connector pins, and
then make sure the resistance
falls in the range of 40 to 50Ω.
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
(Gray) 6
Troubleshooting by Indication on the Remote Controller
YES
NO
* X26A only for RXYQ5M
NO
YES
Measuring points
1 - 6
2 - 6
3 - 6
4 - 6
External factor other than
malfunction (for example, noise
etc.).
After connecting, turn the power
off and then back on again.
Replace the moving part of the
electronic expansion valve.
Replace the connecting cable.
Replace outdoor unit PC board
(A1P).
(V3067)
(V3067)
247